That tab will work just fine for a chassis ground. You'll still need to run another cable up to the engine block for an engine ground. There are a lot of amps that need to flow back and forth between the battery, starter and alternator. Your ground cable running to the engine should be at least a #8 welding cable and something like #4 would be even better. You can get high quality multi-strand welding cable from Amazon. The more strands the better.